CN201781073U - Electrical lap joint device - Google Patents
Electrical lap joint device Download PDFInfo
- Publication number
- CN201781073U CN201781073U CN2010202991773U CN201020299177U CN201781073U CN 201781073 U CN201781073 U CN 201781073U CN 2010202991773 U CN2010202991773 U CN 2010202991773U CN 201020299177 U CN201020299177 U CN 201020299177U CN 201781073 U CN201781073 U CN 201781073U
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- CN
- China
- Prior art keywords
- lap joint
- lap
- lug plate
- electrical
- electric
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to an electrical lap joint device, which comprises a screw cap, a spring plate, a toothed gasket, a lap joint plate, a lap joint rod, a mounting panel, a lug plate, a spring washer and a self-locking nut. The spring plate, the toothed gasket and the lap joint plate are disposed at the left end of the lap joint rod together and fixedly locked via the screw cap. The mounting panel is provided with a square hole and sleeved at the right end of the lap joint rod, and the lug plate is pressed on the mounting panel via the spring washer and locked by the self-locking nut. The lap joint rod is fixed on the mounting panel via the electrical lap joint device. The electrical lap joint device has fine contact and anti-loosening functions through the screw cap, has fine 200 mu omega grounding effect, can be assembled and disassembled quickly, increases reliability of electronic and electrical products in terms of electromagnetic compatibility, shielding and the like, provides stable low-impedance electrical channels among electronic devices, prevents electromagnetic interference level generated among the electronic devices, and then has higher actual application values.
Description
Technical field
The utility model relates to a kind of electric lap device.
Background technology
Grounding technology is the important technology that any electronics, electric equipment all must adopt, and it is not only, and protection is implemented and the necessary means of personal safety, also is the control electromagnetic interference, guarantees the installation electromagnetical compatibility, improves the important technique measure of equipment dependability.Desirable ground plate is the physical entity of one zero status, zero impedance, and it can be used as the reference point of all signal levels in each relevant circuit, and any unwanted electric current does not produce voltage drop by it.
In fact, the desirable ground plane of what is called just is similar to.The ground connection effect of a grounding system depends on potential difference that may exist between 2 in the system and the size of current of passing through this system.One good " " its current potential should be: with the circuit of any funtion part in the circuit relatively, can ignore.
The electronic electric equipment housing should have good shielding, and is provided with the frame ground device.Everyly can produce electromagnetic energy or, all can form electromagnetic interference the electronic electric equipment or the parts of electromagnetic field sensitivity.Yet in fact, therefore can the safety and the performance of electronic system be exerted an influence because the resistance that the overlap joint circuit exists is difficult to realization Low ESR electrical equipment path, thereby is difficult to realize effective electromagnetic shielding.
The utility model content
The purpose of this utility model is: in order to solve the big problem of the electric bond impedance of prior art, the utility model provides a kind of impedance little, can realize Low ESR electrical equipment path, has the electric lap device of good earth performance.
The technical solution of the utility model is: a kind of electric lap device, it comprises nut, spring leaf, grooved metal gasket, bonding jumper, lap bars, installation panel, lug plate, spring washer and self-locking nut, wherein, has the square platform that a lap bars when preventing that nut from installing is rotated in the middle of the described lap bars, has the overlap joint hole in the middle of described spring leaf and the grooved metal gasket, described grooved metal gasket and bonding jumper are arranged in the spring leaf of bending, and be socketed on the lap bars, and one side of spring leaf and grooved metal gasket and bonding jumper are arranged on the left end of lap bars together, and be locked by nut, another sheet is enclosed within the right-hand member of lap bars; Described installation panel has square hole, is socketed in the right-hand member of lap bars, and described spring washer is pressed in lug plate on the installation panel, and is locked by self-locking nut.
Described lug plate has four toothings that are used for stop.
Described lug plate is flat solid sheet
The length and width of described lug plate, thickness rate are 25: 5: 1.
The threaded portion of the inner lap bars of described self-locking nut scribbles locking glue.
The utility model has the advantages that: the electric lap device of the utility model, the design assembling by special is fixed to lap bars on the installation panel, and reaches excellent contact and locking functions by nut member, thereby has low-impedance good earth effect.And have quick demolition, installation, and 200 good μ Ω ground connection effects can be provided, put forward the reliability of electronic and electrical equipment at aspects such as electromagnetic compatibility, shieldings.For stable Low ESR electric path is provided between the electronic equipment, thereby prevent to produce between them the electromagnetic interference level.
Description of drawings
Fig. 1 is the structural representation of electric lap device one better embodiment of the utility model;
Fig. 2 is the assemble sequence figure of Fig. 1;
Fig. 3 is the structural representation of lug plate among Fig. 1;
Fig. 4 is the structural representation of installation panel among Fig. 1;
Fig. 5 is the end view of contact-making surface between grooved metal gasket and the bonding jumper among Fig. 1.
Wherein, 1-nut, 2-spring leaf, 3-grooved metal gasket, 4-bonding jumper, 5-lap bars, 6-installation panel, 7-lug plate, 8-spring washer, 9-self-locking nut.
Embodiment
Below the utility model is described in further details.
Please consult Fig. 1 and Fig. 2 simultaneously, wherein, Fig. 1 is the structural representation of electric lap device one better embodiment of the utility model, and Fig. 2 is the assemble sequence figure of Fig. 1.In the present embodiment, described electric lap device comprises nut 1, spring leaf 2, grooved metal gasket 3, bonding jumper 4, lap bars 5, installation panel 6, lug plate 7, spring washer 8 and self-locking nut 9.Wherein, described lap bars 5 is used for being connected of this device and electrical box installed surface, and the centre is 1.3 thick 4.5 * 4.5 square platform, can guarantee that nut prevents the lap bars rotation when installing.Has the overlap joint hole in the middle of described spring leaf 2 and the grooved metal gasket 3.Described grooved metal gasket 3 and bonding jumper 4 are arranged in the spring leaf 2 of bending, and are socketed on the lap bars 5, and one side of spring leaf 2 and grooved metal gasket 3 and bonding jumper 4 be together at the left end of lap bars 5, and are locked by nut 1.Another sheet is enclosed within the right-hand member of lap bars 5.Described installation panel 6 is socketed in the right-hand member of lap bars 5.Wherein, described spring washer 8 and self-locking nut 9 are installed inner lap bars threaded portion (being coated with locking glue on the screw thread) lug plate 7 are pressed on the installation panel 6, and by self-locking nut 9 lockings.
Wherein, nut 1 and spring leaf 2 is assembled together with grooved metal gasket 3, and clinch nuts 1 is turned over riveting with spring leaf 2 and grooved metal gasket 3 and is integral, thereby is convenient to Fast Installation.Described spring leaf effect is that nut prevents to become flexible, and forms the one interconnect function with casing, the convenient installation.The tooth of described grooved metal gasket 3 tightly is being pressed under the effect of nut 1 on the external bonding jumper 4, thereby guarantees that electric contact is good.When nut rotated, grooved metal gasket did not rotate with it, and bonding jumper 4 does not rotate with nut yet, thereby guarantees the surperficial intact of external bonding jumper 4.
The effect of described lug plate 7 is connect box installed surface internal interface ground wires.See also Fig. 3, it is the structural representation of lug plate 7.Described lug plate 7 has four toothings that are used for stop, and described four teeth have the effect of removing oxide-film when rotating, thereby further guarantees the good electric property that contacts with the casing installed surface.
Please consult Fig. 4 simultaneously, described installation panel 6 centers have the square hole that passes for lap bars 5, during actual installation, and 6cm around the polishing installation panel 6 two sides square holes
2The zone is removed its surperficial oxide layer fully.Simultaneously, lap bars 5 was placed on alcohol immersion 30 minutes in advance, 4.5 * 4.5 side's platforms pass the square hole of electrical box installed surface on the lap bars 5, are installed in rapidly on the installation panel 6.
In addition, described lug plate 7 is flat solid sheet, thereby provides bigger surface area to reach low value radio-frequency (RF) impedance (radio-frequency current flows along conductive surface).In 30 mhz frequencies scopes, the actual measurement radio-frequency (RF) impedance of typical spade lug is close to linear the increase along with increasing of frequency; The part of this impedance is that the self-induction by lug plate causes.Must consider self-resonant frequency because lug plate at this frequency band not effectively.When frequency was higher, lug plate length can be comparable with wavelength, and lug plate is equivalent to radio-frequency transmission line, and its impedance can be periodically big from little change along with increasing of frequency.In this case, because lug plate is passed through by radio-frequency current, there is radio-frequency voltage at its two ends, just make it become a radio-frequency (RF) energy device.For fear of this situation, should make the flakiness ratio of bonding jumper become big 5: 1.
The physical dimension of lug plate has a significant impact radio-frequency (RF) impedance in addition.When one timing of bonding jumper width, along with length 1 increases, its impedance is non-linear increase; But when width b increased, the lug plate impedance then was non-linear decline.Test shows, when the ratio of the length of lug plate and width reduced, its relative reactance meeting obviously descended.When length and width ratio is 5: 1 lug plate, its induction reactance only is a thin electric wire 45%.Therefore the lug plate 7 in the utility model is of a size of length: wide: thickness rate is 25: 5: 1.
See also Fig. 5 again, it is the contact surface side view.In theory, mounting torque is bigger to the influence of contact resistance, and two unlimited hard surfaces can only contact (plane of the three-point fix in the machinery) on three coarse points.Its contact point is increased, and the real area of electric contact equals the summation of each contact point contact area.Electric current can pass through having set up between these contact point surfaces of real Metal Contact.And acting on of self-locking nut can not be become flexible under the various adverse circumstances, guarantees that simultaneously lug plate closely contacts with the casing installed surface; By applying the certain pressure pretightning force,, can make other coarse points also constitute contact because material exists strain and plasticity.Therefore, electric current only in crimp, set up between these coarse some surfaces of real Metal Contact and passed through.Therefore the real area of electric contact equals the summation of each coarse some contact area.
The utility model electrical lap joint device assembles by special design in sum, lap bars is fixed on the installation panel, and reaches good contact and locking functions by nut member, thereby have low-impedance good earth effect. And have quick demolition, installation, and 200 good μ Ω earthing effects can be provided, carry electronic and electrical equipment in the reliability of the aspects such as electromagnetic compatibility, shielding. For stable Low ESR electric path is provided between the electronic equipment, thereby prevent from producing between them the electromagnetic interference level.
Claims (5)
1. electric lap device, it is characterized in that: comprise nut (1), spring leaf (2), grooved metal gasket (3), bonding jumper (4), lap bars (5), installation panel (6), lug plate (7), spring washer (8) and self-locking nut (9), wherein, has the square platform that a lap bars when preventing that nut from installing is rotated in the middle of the described lap bars (5), has the overlap joint hole in the middle of described spring leaf (2) and the grooved metal gasket (3), described grooved metal gasket (3) and bonding jumper (4) are arranged in the spring leaf (2) of bending, and be socketed on the lap bars (5), and one side of spring leaf (2) and grooved metal gasket (3) and bonding jumper (4) are arranged on the left end of lap bars (5) together, and be locked by nut (1), another sheet is enclosed within the right-hand member of lap bars (5); Described installation panel (6) has square hole, is socketed in the right-hand member of lap bars (5), and described spring washer (8) is pressed in lug plate (7) on the installation panel (6), and is locked by self-locking nut (9).
2. electric lap device according to claim 1 is characterized in that: described lug plate (7) has four toothings that are used for stop.
3. electric lap device according to claim 2 is characterized in that: described lug plate (7) is flat solid sheet.
4. electric lap device according to claim 3 is characterized in that: the length and width of described lug plate (7), thickness rate are 25: 5: 1.
5. electric lap device according to claim 4 is characterized in that: the threaded portion of the inner lap bars of described self-locking nut (9) scribbles locking glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202991773U CN201781073U (en) | 2010-08-19 | 2010-08-19 | Electrical lap joint device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202991773U CN201781073U (en) | 2010-08-19 | 2010-08-19 | Electrical lap joint device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781073U true CN201781073U (en) | 2011-03-30 |
Family
ID=43794278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202991773U Expired - Fee Related CN201781073U (en) | 2010-08-19 | 2010-08-19 | Electrical lap joint device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110494658A (en) * | 2017-03-24 | 2019-11-22 | Ejot建筑紧固件有限责任公司 | Fixed disk and for initially fix tightening member and remove protective film method |
-
2010
- 2010-08-19 CN CN2010202991773U patent/CN201781073U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110494658A (en) * | 2017-03-24 | 2019-11-22 | Ejot建筑紧固件有限责任公司 | Fixed disk and for initially fix tightening member and remove protective film method |
| US11313394B2 (en) | 2017-03-24 | 2022-04-26 | Ejot Baubefestigungen Gmbh | Fixing disc and method for initially fixing a fastening element and removing a protective film |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20160819 |